Process and apparatus for the manufacture of wire gauze



June 18, 1935. K. SCHMID 2,005,270

PROCESS AND APPARATUS FOR THE MANUFACTURE OF WIRE GAUZE Filed Nov. 3, 1932 Fig- 1 Fig.2

l/Vl/f/VTOR mm 6' cam/a Patented June 18, 1935 UNITED s S PATENT OFFICEd 5 Claims. (01. 139-48) In the manufacture ofpaper, inorder to prevent the warp wires of a wire gauze servingas a paper sieve from ,eating'into' the material of the suction box, it has already been proposedi'to -15 arrange the warpwires of the metal gauze in an. oblique direction .to the direction of-run of the..'sieve, namely preferably so that'they run zigzag. 'An attempt has been made to obtain such a positioning of thewarp wiresby displacing a wire gauze woven in the usual'manner and fed to the gauze beam in alternate directions together with the beam, opposite a guide roller located over the beam.

Such a process can hardly be used in practice as by. the displacement of; the already completely woven wire gauze in twoopposite directions, a temporary distortion only of the gauze can be obtained, and not a sharply defined zigzag course of the warp wires or a lasting positioninggof these zigzag arranged wires- .Onthecontrary the oblique'positioning disappears in courseof operation and the familiar disadvantages occur, namely the warp wires eat intothe ,suction coveringiand there is a sharp impression of the warpwires. I

According tothe invention, for the manufacture of a woven wire gauze, the warpwiresof which are arranged slightly zigzag in the direction of the run of the gauze, all the warp wires, in order that they may be fixed in a direction located slightly obliquely to the direction of run of the gauze, by alternate lateral displacement of the reed towards either direction, the warp wires are crossed at an angle deviating from 90, with the weft wires and by striking against the reed are deformed in such a manner that each warp wire is bent over the weft not vertically, but obliquely to its longitudinal direction, so that in conjunction with the marked undulations of the weft wires, unlike the usual metal gauze, the warp wires are prevented from being stretched straight.

By the employment of such a process, as the warp wires rest firmly on the weft wires and are relatively stiff, they are not drawn straight, but retain their zigzag positioning even in operation and after, considerable use.

Consequently, the wires cannot eat into the suction covering and the resultant impression of the grooves in the warp wires or sewing wires cannot occur, and the life of. the paper sieve is considerably increased and also the supervision of the paper sieve is simplified, as the paper sieve thus made can easily be controlled.

For carrying out the process according to the invention, it is preferable to arrange a reciprocation of the reed in the direction of the weft,

which is obtained by way of an eccentric and-a lever mechanism acting on the reed and which,

by way of a, worm mechanism, engages with a l shaft runningin the direction of the weft, which shaft, by means of a ratchet wheel, is driven by a pawl which moves the latter further at each movement of the sley. This pawl may be attached to the loom frame and engage with the ratchet wheel. at each backward movement of the sley, or may be attached to the loom sley, and at eachv backward movement of the latter can be pressed down by a stationary stop, therebygiving the ratchet wheel a further movement.

A typical example of the. wire gauze according to the invention and an apparatusfor manufacturing it are shown in the drawing, wherein: Fig. 1 is a view of the woven wire gauze with warp wires running in a zigzag direction, being somewhat exaggerated.v

Fig. 2 is a view of the apparatus for'moving the loom sley, seen "in the directionof the weft..

' As can be seen from Fig. 1, the warp wires a are displaced transversely: toathe direction-mfithe run of the gauze namelytowardssonegside{and then the other. .ihesslantofuthe warp wiresis-,exaggerated and, actually, is hardly perceptible with side of the'sley by means of guide screws 3 engaging through the slot 4 of the reed. Thesley is carried in a well known manner by two support levers 20 that are swung to and fro. The reed is connected at either side to a tension rod 5, which is actuated by double-armed levers 6. The latter are'adapted to pivot about a pin 1 connected to the sley I, and their free ends engage with an eccentric rod 8 or with a rod 9 connected with the latter, each of which is reciprocated'by means of a shaftlll and an eccentric m. The shaft H is driven by way of a worm wheel l2 co-operating with a worm l3 which is mounted on a shaft I4 and carries a ratchet wheel l5 which on every reciprocating movement of the sley in the act of beating up the filling, is turned by a springcontrolled pawl H5. The pawl is adapted to pivot in a fork-shaped holder H which is attached to an arm l8 that is pivotally connected to one of the support levers, i. e. the so-called lay pitmen to actuate the ratchet wheel after every time the sley at its backward movement moves out of the texture. The arm l8 so far as attached to the lay pitmen may be pressed down during the returning movement of the sley by a stationary stop of the loom frame or it may be itself attached to the loom frame and engage by its spring controlled pawl IS with the ratchet wheel l at every backward movement of the sley.

I claim: I 1. A loom for manufacturing wire gauze with warp wires that extend slightly zigzag in the direction of the run of the gauze, comprising a reciprocating sley, a reed displaceable across the sley in either direction, means for slidably guiding the reed in the sley in the direction of the weft, the reed being adapted to hold all the warp wires in the act of beating up the filling in a parallel position deviating at a slight angle from the reciprocating direction of the sley, a mechanism'operatively connected to the move able reed and arranged to effect its lateral move-- ment and means operated by the returning movement of the batten for actuating said mechanism. 1

2. A loom for manufacturing wire gauze with warp wires that extend slightly zigzag in the direction of the run of the gauze, comprising a reciprocating sley, a reed displaceable across the sley in either direction, means for slidably guiding' the reed in the sley in the direction of the weft, the reed being adapted to hold all the warp wires in the act of beating up the filling in a parallel position deviating at a slight angle from the reciprocating"direction of the sley, a lever mechanism operatively connectedto the movable reed and actuated by means of a ratchet wheel, an intermediate gearing and an excentric, said ratchet wheel being mounted on a shaft positioned in the direction of the weft and'cooper- 'ating with a pawl arranged on the sley and moved at each return'movement of the latter.

3.. Aloom for manufacturing wire gauze with warp wires that extend slightly zigzag in the direction of the run of the gauze, comprising a reciprocating sley, a reed displaceable across the sley in either direction, means for slidably guiding the reed in the sley in the direction of the weft, the reed being adapted to hold all the warp wires in the act of beating up the filling in a parallel position deviating at a slight angle from the reciprocating direction of the sley, a lever mechanism operatively connected to the movable reed and actuated by means of a ratchet wheel, an intermediate gearing and an excentric, said ratchet Wheel being mounted on a shaft positioned in the direction of the weft and cooperating with a pawl adapted to pivot in a forked holder that is mounted by an arm in one of the lay pitmen and is moved down at each backward movement of the batten.

4. A loom for manufacturing wire gauze with warp wires that extend slightly zigzag in the direction of the run of the gauze, comprising a reciprocating sley, a reed displaceable across the sley in either direction, means for slidably guiding the reed in thesley in the direction of the weft, the reed being adapted to hold all the warp wires in the act of beating up the filling in a parallel position deviating at a slight angle from the reciprocating direction of the sley, a lever mechanism operatively connected to the movable reed and actuated by means of a ratchet wheel, an intermediate gearing and an excentric, said ratchet wheel being mounted on a shaft positioned in the direction of the weft and cooperating with a pawl arranged on the loom frame and engaging with the ratchet wheel at every backward movement of the batten.

5. A loom for manufacturing wire gauze with warpv wires that extend slightly zigzag in the direction of the run of the gauze, comprising a reciprocating sley, a reed displaceable across the sley in'the direction of the weft, means for slidably guiding the reed in the sley in the aforesaid direction, means for imparting a stepwise predetermined lateral movement to the whole reed during every backward movement of the sley, said'reed having parallel dents adapted to hold all the warp wires in the act of beating up the filling in a parallel position deviating at a slight angle from the reciprocating direction of thesley. i

' KARL SCHMID. 

